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公开(公告)号:US20150107337A1
公开(公告)日:2015-04-23
申请号:US14398091
申请日:2013-04-04
Applicant: Robert Bosch GmbH
Inventor: Metin Guere , Norbert Schneider , Karl Wenzel , Axel-Wermer Haag , Rolf Reischl
IPC: G01N27/22
CPC classification number: G01N27/223
Abstract: A circuit system for measuring a sensor element capacitance of a sensor element, in particular of a capacitive humidity sensor, including: the sensor element, which has the sensor element capacitance; a charge storage element, which is connected directly, or only via a resistor element, in series to the sensor element; and a control unit, which is configured to charge the charge storage element to a reference voltage and to successively transfer the charge via the sensor element capacitance until the charge storage element has reached a particular comparison voltage, the sensor element number of transfer processes thus ascertained representing information about the sensor element capacitance of the sensor element.
Abstract translation: 一种用于测量传感器元件,特别是电容式湿度传感器的传感器元件电容的电路系统,包括:具有传感器元件电容的传感器元件; 电荷存储元件,其直接或仅经由电阻器元件串联连接到传感器元件; 以及控制单元,其被配置为将电荷存储元件充电到参考电压,并且经由传感器元件电容依次传送电荷,直到电荷存储元件达到特定的比较电压,从而确定传输过程的传感器元件数 表示关于传感器元件的传感器元件电容的信息。